package com.atguigu.ucenter.controller;

import com.atguigu.commonutils.JwtUtils;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.atguigu.ucenter.entity.Member;
import com.atguigu.ucenter.service.MemberService;
import com.atguigu.ucenter.utils.ConstantPropertiesUtil;
import com.atguigu.ucenter.utils.HttpClientUtils;
import com.google.gson.Gson;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.net.URLEncoder;
import java.util.HashMap;

@CrossOrigin
@Controller//只请求地址，不需要返回地址
//@RestController
@RequestMapping("/api/ucenter/wx")
@Slf4j
public class WxApiController {
    @Autowired
    MemberService memberService;
    //生成微信二维码
    @GetMapping("login")
    public String getWxCode(){
        //
        //固定地址后面拼接参数
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";
        //对redirect_url进行URL进行URLEncoder编码
        String redirectUrl = ConstantPropertiesUtil.WX_OPEN_REDIRECT_URL;
        try{
            redirectUrl = URLEncoder.encode(redirectUrl, "UTF-8");
        }catch (Exception e){

        }

        String url = String.format(baseUrl,
                ConstantPropertiesUtil.WX_OPEN_APP_ID,
                redirectUrl,
                "atguigu"
                );


        //请求微信地址
        return "redirect:" + url;

    }


    //2.获取扫描人信息。添加数据
    @GetMapping("callback")
    public String callback(String code, String state)  {
        try {

            //获取code请求，微信固定的地址，得到两个值  accsess_token和openid
            String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                    "?appid=%s" +
                    "&secret=%s" +
                    "&code=%s" +
                    "&grant_type=authorization_code";
            //拼接三个参数：id 密钥和code值
            String accesssTokenUrl= String.format(baseAccessTokenUrl,
                    ConstantPropertiesUtil.WX_OPEN_APP_ID,
                    ConstantPropertiesUtil.WX_OPEN_APP_SECRET,
                    code
            );
            //请求这个拼接好的地址，得到两个值返回：accsess_token和openid
            //使用httpclient发送请求，得到返回结果

            String accessTokenInfo = HttpClientUtils.get(accesssTokenUrl);
            Gson gson = new Gson();
            HashMap mapAccessToken = gson.fromJson(accessTokenInfo, HashMap.class);
            String accessToken = (String) mapAccessToken.get("access_token");
            String openid = (String) mapAccessToken.get("openid");


            //把扫描人信息添加数据库里面
            //判断数据表里面是否存在相同微信信息，根据openid判断
            Member member = memberService.getOpenIdMember(openid);
            if (member == null){
                //访问微信的资源服务器，获取用户信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                String userInfoUrl = String.format(
                        baseUserInfoUrl,
                        accessToken,
                        openid
                );
                String userInfo = HttpClientUtils.get(userInfoUrl);
                HashMap hashMap = gson.fromJson(userInfo, HashMap.class);
                String nickname = (String) hashMap.get("nickname");
                String headimgurl = (String) hashMap.get("headimgurl");
                member = new Member();
                member.setOpenid(openid);
                member.setNickname(nickname);
                member.setAvatar(headimgurl);
                memberService.save(member);
            }
            //使用jwt 根据member对象生成token字符串
            String jwtToken = JwtUtils.getJwtToken(member.getId(), member.getNickname());
            return "redirect:http://localhost:3000?token=" + jwtToken ;

        }catch (Exception e){
            throw new GuliException(20001,"登录失败");
        }
    }




















}
